func OnLineHeader(){
}
func OnTrace () {
	sx = Tr.SrPtXC;
	sy = Tr.SrPtYC;
	rx = Tr.RcPtXC;
	ry = Tr.RcPtYC;
        if (sx == 0) Tr.StaCor = 30000;
        if (sy == 0) Tr.StaCor = 30000;
        if (rx == 0) Tr.StaCor = 30000;
        if (ry == 0) Tr.StaCor = 30000;
        output(Tr);
}
func End(){
print (" end of xy ufh (kill traces with zero shot/rec coodinates) \n");
}